eduMFA: Unauthenticated Failcounter Increment on Resolver Tokens via /validate/check
Impact
If the resolver parameter is passed, but the user does not exist, all failcounters of tokens in that resolver will be increased.
Patches
This, along with other issues, was fixed in eduMFA v2.9.1.
Workarounds
Limiting access to /validate/check to client applications (i.e. Shibboleth/FreeRADIUS) using an authorization policy with api_key_required or using e.g. the reverse proxy.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | edumfa | < 2.9.1 | 2.9.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-20- Platform
- Python (PyPI)
- Package
edumfa- Disclosed
- 18.05.2026
- Updated
- 11.10.2026 12:19
Sources and licenses
OSV / GitHub Advisory Database - GHSA-74r7-3mjm-jc5v - CC BY 4.0
Vulnerability history: edumfa
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 07.2024 05.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 2
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 3
-
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